package main

import "fmt"

func stepList(n int) {
	for i := 1; i <= n; i++ {
		space := n - i
		fmt.Printf("%*s", space*2, "")
		for j := i; j >= 1; j-- {
			fmt.Printf("%d ", j)
		}
		fmt.Println()
	}
}

func main() {
	stepList(12)
}
